GSTDTAP
DOI10.1007/s00382-019-05019-1
ENSO-related droughts and ISM variations during the last millennium in tropical southwest China
Gu, Yansheng1,2; Liu, Hongye1,2; Traore, Djakanibe Desire3; Huang, Chunju1
2019-11-05
发表期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2019
文章类型Article;Early Access
语种英语
国家Peoples R China
英文摘要

Severe El Nino-Southern Oscillation (ENSO) droughts that occurred in southwest China during the last millennium have exerted important impacts on natural ecosystems and human society. Fossil phytoliths in high-resolution (similar to 7 year) fluvial sediments in the monsoon rainforest are studied to reveal the influence of ENSO activity on tropical southwest China. The phytolith records together with multiproxy analysis indicate that three phases of distinctively warm-dry and cool-wet climate pattern have exerted profound influences on the sedimentary environment and tropical monsoon rainforest, which is sensitive to the occurrences of severe droughts and fires. Integrated comparisons demonstrate that climatic variations rebuilt by Ic (temperature proxy) are consistent with the temperature change in the Northern Hemisphere, Indian Summer Monsoon (ISM) variations in the northern Indian Ocean and southwest China, and aridity index (Iph) is linked to ENSO activity in the equatorial Pacific Ocean. At decadal timescale, there is an internal connection between ISM variability and ENSO activity in the tropical southwest China. Due to the modulation of ENSO activity, there is an antiphase relationship between temperature and ISM intensity, with a remarkably dry Medieval Warm Period (MWP), Modern Warming (MW) and a mostly wet Little Ice Age (LIA) during the last millennium. Spectral analysis of the climatic indices (Ic and Iph) indicated that the dominant cycle (similar to 88 year) is a significant component of periodic solar activity variations. Our results confirmed that the possible forcing mechanism of such a "warm-dry and cool-wet" climate pattern is related to the coupling of solar periodic variations and ENSO variance spanning the tropical Indian Ocean and the "Indian subcontinent-southwest China". This is significant of understanding the relationship among droughts, ENSO variance and ISM variation in the tropical southwest China under the background of global warming.


英文关键词Monsoon rainforest Droughts ENSO ISM Last millennium Southwest China
领域气候变化
收录类别SCI-E
WOS记录号WOS:000494426500003
WOS关键词EL-NINO/SOUTHERN-OSCILLATION ; CLIMATE-CHANGE ; ASIAN MONSOON ; PHYTOLITH ASSEMBLAGES ; PACIFIC CLIMATE ; LATE HOLOCENE ; INDICATORS ; VARIABILITY ; VEGETATION ; DYNAMICS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/224217
专题环境与发展全球科技态势
作者单位1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China;
2.China Univ Geosci, Hubei Key Lab Wetland Evolut & Ecorestorat WEER, Wuhan 430074, Hubei, Peoples R China;
3.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China
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GB/T 7714
Gu, Yansheng,Liu, Hongye,Traore, Djakanibe Desire,et al. ENSO-related droughts and ISM variations during the last millennium in tropical southwest China[J]. CLIMATE DYNAMICS,2019.
APA Gu, Yansheng,Liu, Hongye,Traore, Djakanibe Desire,&Huang, Chunju.(2019).ENSO-related droughts and ISM variations during the last millennium in tropical southwest China.CLIMATE DYNAMICS.
MLA Gu, Yansheng,et al."ENSO-related droughts and ISM variations during the last millennium in tropical southwest China".CLIMATE DYNAMICS (2019).
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